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G. E. SORI ER. NATURAL GAS PROTECT EXTINGUISHER.

No. 393,396. Patented Nov. 27, 1888.

mu In! wi l 1 wum UNITED STATES PATENT @EEiQE.

(HIARLI'IH .l l. fiUillBlTl llt, Oh (JIHUAGO, ILLINOIS, ASSIGNOR TO'illll \ViCS'll lll-N ELECTRIC COMPANY, OF SAME PLACE.

NATURAL-GAS PROTECTIVE EXTlNGUISHER.

SPECIFICATION forming part of Letters Patent No. 393,396, dated November27, 1888.

To all [I l/101)] H HM/Z] concern: as, for example, when the pressurel'alls sudlle it known that 1, (minutes l HbltllliNltlt, denly much.lower than the normal. In this a citizen of the United ,States,esit'itng at (ihimanner the gas is shut oft, and hence it the cago, inthe county of (look and State of ]llipressure is increased again nodamage will be 5 uois, have invented a certain new and usefuloccasioned. 'lhethermostatd is so constructed Improvement in Natural-GasIlrotcctivc Exand arranged with respect to the flame or jct tinguishers,(Case 152,) of which the following 0 that as long as the jet is burningits contacts is a full, clear, concise, and exact description, willremain open, as shown. When the jet is reference being had to theaccompanyingdrawextinguished, however, the eontactswill close. to ings,t't'irlning apart of this specification. The form of thermostat which lhave shown "to in supplying gas for heating and illuminaconsistsotsprings each. composed on opposite tion it is desirable that thepressure should be sides of mctals--as, for erample, zinc andcopinaintaincd as nearly constant as possible. In per-having unequalcoet'licients of expansion cascol'naturalgas,especially,ithasbeenfoundwhen heated. it do not, however, limit my impracticable to at all timesmaintain a coninvention to any particular form of thermoo stant anduniform .tlow of the gas. When the stat, since there are variousthermostats well pressure suddenly falls, as it frequently docs, knownin the art which might be employed the gas is extinguishcd,and,theprcssuretherewith equally good results. after being increased, theescaping lills The cock I), as shown, is open. lhe arm 0,

the building, until, tlnally,tlmcscapcd gas, bewhich is attached to cookI). is preferably 7c coming ignited, explodes. Accidents of thisweighted, its weight being sui'tieicnt, in consort have been of frequentoccurrence hereto- 5 ncction with rctractile spring f, to turn the fore,and on this account natural gas espccock when said arm is released, soas to shut cially, which is highly explosive, has not oil the supply,the arm when so released t'allfound thcl'avor with the public whichitmight ing to the position indicated by the dotted 7 otherwise haveobtained. I lines in Fig. 1.. This weighted arm is normally The objectof my invention isle provide for held in the position shown by catch 1upon automatically shutting oil" the gas when for an armature-lever ofan electro-nmgnctiedcany reason the pressure falls so low as to exvice.The coils Oihilt)(litlChlO'lllttgilOhiC device 0 tinguish the :tlamc. inthis manner the How are included in circuit with a battery, It. and :1.st ol'gas is checked and all danger of explosions thermostat, it. inlhiseircnit isalso preferably is avoided. included the arm 1' and thecatch g, in order My invention consists in elect-ro-maguetic thatthecircuitmayheopened,when the-arm is apparatus so combined with thegas-pipes and allowed to fall. As long as thcjct econtinucs 5 the flamethat on extinguishing the (lame the to burn, the thermostat 1/. remainsopen. and s; apparatus will be operated automatically tolumeethecircuitot' battery/I, throu h the coils cut off the gas supply.oiclectromagnet i, will remain open at the l have in theaccom'ninyingdrawings illus thermostat. Supposing, now, the-gas should hetrated one form of apparatus embodying mymomentarilycutoll'orthepiessurediminished o mvention, in whichsul'liciently to extinguish the jet r, thethernio- Figure l. is asideelevation of my automatic stat becoming cold imn'iediateiy, its contactsgas-extinguisher apparatus, and Fig. 2 is a will come together, thusclosing the circuit, of plan view of the same. battery It through thecoils i. .l.hecircuit be- .l.hc gas-pipe (0 maybe considered as coningthus closed, the armature carrying the nccted with the mains and ofsuilicientsize to catch g will be moved so as to release the arm 9supply a dwellirig-house. in this gaspipc is e. Tlhercupon the cock Iwill be turned, the placed a cock or shut-0H, I. spriugj'bi'iiugpret'erably employed in conncc My invention is designed tofurnish ready tion with the weighted arm 0. Assoon as the means ofautomatically closing a cock I) when arm 0 separates from the catch Itthe circuit .lor any reason the llarne(fis'oxtinguished-- will be againbroken. A weighted arm or I drop 0 might be used alone, or a spring f ofsufficient strength, without departing from my invention.

It will be understood that thegas-jet 0 should be supplied from the pipeat in such position and under such conditions that it will surely beextinguished when any other jet supplied from the same pipe isextinguished.

llaving thusdescribcd myinvention, lclaim as new and desire to secure byLetters Patent- 1. A gas protective extinguisher consisting of a cock orshut-oil" in the supply-pipe, in combination with a gas-jet suppliedfrom said pipe, a thermostat placed in position to be heated by the jet,actuating mechanism for turning the cock or shut-oil", and anelectromagnetic device in a battery-circuit with the thermostat, wherebyon extinguishing the jet the electromagnetic device is operated torelease the actuating mechanism, substantially as described.

2. The combination, with the gas supply pipe, oi a cock or shutoffincluded therein, actuating mechanism for closing said shut-oil,

an electromagnetic device normally retaining or holding out of operationthe said actuating mechanism, a gasjet supplied from the said gas-so pply pipe, a thermostat in position to be heated thereby, and abatterycireuit through the electromagnetic device, which is closed whenthe jet is extinguished, substantially as described.

3. The combination,with the supply-pipe (1 ofa iet, c. supplied fromsaid pipe, a thermostat heated by said jet and standing normally openwhen heated a shutoff included in said supply-pipe, and anelectromagnetic device whereby said shut oil is operated when the jet isextinguished and the contacts of the thermostat closed, the circuit ofthe electromagnetic device being opened by the ClOSiHg of the shut-off,substantially as described.

In witne' s \"E: on! .aereunlosubscribe my name this 2d day of May, A.i). l-Fifit? CHARLES E. SUltlliNlGlt \Vitnesses:

(June. 0. Woomvoa'rn, CHAS. (2. HAWLEY.

